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Transmission

Tiny
REED89
  • MEMBER
  • 1999 MAZDA 626
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 210,000 MILES
I have a 99 mazda 626 es 2.0 4 cyl automatic. When im driving the rpms jump, mainly when the car is warmed up. I brought the car to aamco and they checked it and said nothing wrong, they hooked it up to scanner and the head guy of the shop test drove it, and a tech, and they said its shifting fine and nothing found when they scanned it. What else can it be? Thanks, Kerry
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Tuesday, March 22nd, 2011 AT 11:07 PM

7 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
So are you saying they did not duplicate the problem? And when you say rpms jump does the sound of the motor jump too or just rpm gauge?
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Tuesday, March 22nd, 2011 AT 11:12 PM
Tiny
REED89
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  • 4 POSTS
They took the car on the highway at speeds of 40+ and it happens around 30 mph usually and it was happening on the way there. Yes you can hear the motor jump. Than it hesitates to shift.
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Wednesday, March 23rd, 2011 AT 12:04 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Does it matter how hard you pres on gas as to whether it does this or not?
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Wednesday, March 23rd, 2011 AT 1:05 AM
Tiny
REED89
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  • 4 POSTS
Seems like when I press hard to get up to speed it doesn't- most of the time, but when I press lightly around 25-30 it does it.
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Wednesday, March 23rd, 2011 AT 2:43 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Sounds like your pressure is low. Could be a downshift control adjustment. Or internal problem.
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Wednesday, March 23rd, 2011 AT 5:21 AM
Tiny
REED89
  • MEMBER
  • 4 POSTS
Thanks. It's weird because the car was running perfect than I was going up a bridge and all of a sudden it's been happening ever since than. Just had timing belt done, could it maybe be that?
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Wednesday, March 23rd, 2011 AT 3:50 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Maybe the downshift control is/got disconnected?
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Thursday, March 24th, 2011 AT 2:27 AM

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